Finding whether the element exists in whole html page
I want to check whether an element exists in the whole page or not. Is there any way to know if the element exists in the page through jQuery?
For example:
<html>
<body>
<p id="para1" class="para_class"></p>
</body>
</html>
In the above code, I have to check whether <p> of id para1 exists in the DOM or not. In any case if 开发者_如何转开发with the help of the 'class' attribute we can know if the element exists, it also would be helpful.
For element IDs:
if($('#para1').length){
//element with id exists
}
For element class:
if($('.para_class').length){
//element with class exists
}
recently I faced the same problem & this is good for me.
if ( $('#para1').length == 1 ){ // if the id exists its length will be 1
alert('This Id exists');
} elseif ( $('#para1').length == 0 ){ // if the id doesn't exists its length will be 0
alert('This Id does not exists');
}
I know I'm a little late, but, to check if an input doesn't exist with an id using JQuery, you can do this:
if (!$('#inputid').length > 0)) {
}
加载中,请稍侯......
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